Coded-light detection system including a camera, light sensor and augmented information display
a detection system and coded light technology, applied in the field of illumination systems, can solve the problems of inadequacies of protocol-based detection methods of data encoded into light from several light sources, inability to perform detection in time, and inability to detect data encoded into light in time, so as to facilitate or even enable suppression of the remaining light received, the effect of facilitating or even enabling the suppression of the identity
Inactive Publication Date: 2015-09-08
KONINK PHILIPS ELECTRONICS NV
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AI Technical Summary
Benefits of technology
This approach enables quicker and more accurate detection of light sources, reducing the time required for identification and improving detection accuracy, especially in scenarios with a high density of light sources or from distant positions.
Problems solved by technology
In case there are additional light sources in the field of view of the photodiode, simultaneously transmitted packets collide and are therefore lost.
However, there are situations in which a protocol-based approach for detection of data encoded into light from several light sources may not be appropriate.
One of such situations is when the available time for performing the detection is limited, for instance, in the case of detection of light emitted from several light sources from a position in a moving vehicle.
Thus, in the latter situation where the distance between the light sources and the photodiode is large, it will become difficult to aim the photodiode at individual light sources.
Method used
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[0079]The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplifying embodiments of the present invention are shown. This present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided by way of example so that this disclosure will convey the scope of the invention to those skilled in the art. Furthermore, like numbers refer to like or similar elements or components throughout.
[0080]Referring now to FIG. 1a, there is shown a schematic block diagram of a sensing device 100 according to an exemplifying embodiment of the present invention.
[0081]The sensing device 100 is adapted to receive light emitted from a plurality 102 of light sources 102a-102e, each of the plurality 102 of light sources 102a-102e emitting light comprising a light source identifier.
[0082]In FIG. 1a there is shown five light so...
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There is disclosed a sensing device (100) adapted to receive light emitted from a plurality of light sources (A, B), each of the plurality of light sources (A, B) emitting light comprising a light source identifier. The sensing device (100) comprises a sensing module (110) comprising a light selection unit (114) configured to receive at least a portion of the light emitted from the plurality of light sources (A, B) and a light selection unit (114) configured to receive at least a portion of the light emitted from the plurality of light sources (A, B). The light selection unit (114) is adapted to selectively convey a selected portion of light received by the light selection unit (114) to a second photo sensor unit (116). The light selection unit (114) is arranged relatively to the first photo sensor unit (112), or vice versa, in such a way that the selected portion of light is associated with a photo sensor of a plurality of photo sensors of the first photo sensor unit (114) detecting light.
Description
FIELD OF THE INVENTION[0001]The present invention generally relates to the field of illumination systems comprising a plurality of light sources, each light source emitting light into which information is coded, and the field of light detection. More specifically, the present invention relates to a sensing device for detecting information encoded into the light output of such illumination systems.BACKGROUND OF THE INVENTION[0002]Light into which information is encoded enables humanly imperceptible transmission of data or information using otherwise visible light emitted by a light source of an illumination system. Particularly in the context of installation and maintenance of such illumination systems, the data or information may comprise a light source identifier, but also light source status information such as temperature, accumulated operating hours, etc.[0003]One technique that has been proposed to provide transmission of such data or information is based on embedding codes, or...
Claims
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IPC IPC(8): H01J40/14H04B10/11H04B10/116H04B10/112
CPCH04B10/11H04B10/116H04B10/1121
Inventor DE BRUIJN, FREDERIK JANDE BEIJER, ARNOLDUS ANTONIUSFERI, LORENZODAMKAT, CHRISMUIJS, REMCO THEODORUS JOHANNESVINK, JELTE PETER
Owner KONINK PHILIPS ELECTRONICS NV